Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 10 - Systems of Equations and Inequalities - Chapter Review - Review Exercises - Page 814: 2

Answer

$(2,\dfrac{1}{2})$

Work Step by Step

$ 3x-4y= 4 ~~~(1)$ $x-3y=\dfrac{1}{2} ~~~(2)$ Multiply equation (1) by $3$ and equation (2) by $-4$, and then add the two equations to evaluate the value of $x$. $5x=10 \implies x=2$ Plug $x=2$ back into one of the equations and solve for y. Thus, $(3)(2)-4y=4 \implies y= \dfrac{1}{2}$ Therefore, $(x,y)=(2,\dfrac{1}{2})$
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